US20060275241A1

US20060275241A1 - Cosmetic towelette product

Info

Publication number: US20060275241A1
Application number: US11/145,744
Authority: US
Inventors: Ewa Padlo; Luis Misso
Original assignee: Unilever Home and Personal Care USA
Current assignee: Unilever Home and Personal Care USA
Priority date: 2005-06-06
Filing date: 2005-06-06
Publication date: 2006-12-07
Also published as: ZA200707499B; CA2599388A1; CN101193683A; KR20080016830A; JP2008541893A; ES2312115T3; EP1893293A1; ATE405326T1; AU2006255313B2; MX2007012120A; WO2006131159A1; AU2006255313A1; CN101193683B; JP4754628B2; EP1893293B1; DE602006002396D1; AR057343A1

Abstract

A cosmetic towelette product is provided which includes a water-insoluble substrate and cosmetic composition in contact with the substrate. The composition includes a copolymer structured from in part a vinyl ester of a C₃-C₂₀acid and a tea extract delivered in a cosmetically acceptable carrier. The combination of copolymer and tea extract insure that color changes in the product are minimized.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention relates to a cosmetic towelette formed from a water-insoluble substrate such as a non-woven cloth in contact with a cosmetic benefit imparting composition and formulated to maintain consistent towelette color stability.
2. The Related Art
Cosmetic towelettes have become commercially quite popular. They are handy for cleansing hands and face. Removal of make-up is particularly effective with these products. Wiping cloths offer the advantages of improved impregnated formulation spreadability, abrasive action and a pleasant ergonomic handfeel.
U.S. Pat. No. 6,491,937 B1 (Slavtcheff et al.) is illustrative of the art. Therein is reported a disposable substantially dry foamable water-insoluble flexible web. Consumers at the point of use wet this product to generate a foaming lather.
Another type of wipe product is reported in U.S. Pat. No. 6,294,182 B1 (Znaiden et al.). Therein is disclosed a disposable towelette impregnated with an alpha-hydroxycarboxylic acid. The latter is delivered to the skin for inhibiting formation of facial fine lines and wrinkles.
Common to many of the chemically impregnated towelettes are ingredients which may tend to alter original color of the product. Consequently there is a need for a system which can stabilize or at least minimize color changes.

SUMMARY OF THE INVENTION

A cosmetic towelette product is provided which includes:

- (i) a water-insoluble substrate;
- (ii) a cosmetic composition in contact with the substrate, the composition including:
  - (a) from about 0.001 to about 10% by weight of the composition of a copolymer formed from monomers one of which is a vinyl ester of a C₃-C₂₀acid;
  - (b) from about 0.000001 to about 2% by weight of the composition of a tea extract; and
  - (c) from about 1 to about 99.9% by weight of the composition of a cosmetically acceptable carrier.

DETAILED DESCRIPTION OF THE INVENTION

Now it has been found that cosmetic towelettes can be stabilized against changes in color through a combination of a co-polymer formed from monomers one of which is a vinyl ester of a C₃-C₂₀acid and with a tea extract.
The vinyl ester of a C₃-C₂₀acid monomer may but is not limited to vinyl propionate, vinyl hexanonate, vinyl octanoate, vinyl decanoate, vinyl isodecanoate, vinyl neodecanoate, vinyl dodecanoate, vinyl hexadecanoate, vinyl octadecanoate, vinyl behenoate and mixtures thereof. Most preferred are vinyl isodecanoate and vinyl neodecanoate. Amounts of this monomer may constitute from about 1 to about 99%, preferably from about 20 to about 80%, optimally from about 40 to about 60% by weight of the copolymer.
One or more other monomers may be present in the copolymer. For purposes of this invention, the term copolymer includes polymers formed from 2, 3, 4, 5 or more different monomers. These other monomers can be selected from acrylic acid, methacrylic acid, ethylacrylate, methyl acrylate, methyl methacrylate, ethyl methacrylate, butyl acrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, divinyl benzene, vinyl caprolactam, vinyl acetate, maleic acid or anhydride, acrylamide, methacrylamide, C_10-30ester of acrylic or methacrylic acids, acryloyldimethyltaurate, styrene, methyl styrene, isoprene, butene, isohexadecane, vinyl chloride, vinyl pyrrolidone, vinyl methyl ether, vinylformamide and combinations thereof, as well as salts of monomers having carboxylate groups. Amounts of the other monomers may range from about 0.1 to about 99%, preferably from about 20 to about 80%, optimally from about 40 to about 60% by weight of the copolymer.
Most preferred is a copolymer with the INCI name of Acrylates/Vinyl Isodecanoate Crosspolymer, commercially available as Stabylen 30® sold by 3V Sigma S.P.A. Stabylen 30® is a copolymer of the ester of vinyl isodecanoate and one or more monomers of acrylic acid, methacrylic acid or one of their simple esters crosslinked with polyalkaryl polyether, ethyl acrylate, methyl methacrylate.
Amounts of the copolymer may range from about 0.001 to about 10%, preferably from about 0.01 to about 5%, optimally from about 0.1 to about 0.5% by weight of a cosmetic composition.
Tea extract is a term intended to mean extracted components from tea less any solvent. The extracts may either be water soluble or water-insoluble and can be carried in a solvent which respectively is hydrophilic or hydrophobic. Water and ethanol are the preferred extract solvents. Amounts of the tea extract may range from about 0.000001 to about 2%, preferably from about 0.0001 to about 1%, optimally from about 0.001 to about 0.5% by weight of the cosmetic composition.
References to “tea” herein are to be construed as references to the tea plant, Camellia sinensis, and its products or to equivalent plants, for example Camellia assaimica, or their hybrids, and the products of such equivalent plants, rather than to unrelated herbal tea products such as chamomile and peppermint.
The overwhelming majority of commercial tea products comprise black teas prepared by aeration, and possibly abrasion, of the leaves of the green tea plant conducted for a time sufficient to change the leaves' color from green to copper and to intensify their flavor. This is a fermentation process wherein various natural chemical reactions, including enzymatic oxidation, occur. Typical of black tea are fermented leaves such as Darjeeling Assam or Sri Lanka types.
Green tea is another important commercial category. Green teas are produced from the plant without extended air exposure, by merely allowing the plant to wither and dry. This variety includes sencha (middlegrade green tea), gyokuro (shaded green tea) or tencha (powdered tea) prepared from green tea leaves obtained from the Genus Camellia, for example, C. sinensis, C. assamica, the Yabukita variety, or a hybrid thereof.
Another tea is the semi-fermented type which is generally called oolong tea, such as tekkannon (Tieguangin), irotane, ougonkei (Huangjgui) or buigancha (Wuyuyaucha).
Yellow teas are prepared by partial fermentation of the raw green tea product, substantially less than would produce a black tea. White teas are prepared from new buds harvested before they open which are withered and gently dried.
Particularly preferred for the present invention are combinations of Camellia Sinensis leaf extract (green tea), white tea leaf extract and Cyclopia Intermedia (Honeybush) Leaf extract. These three tea extracts essentially combine green, white and black tea. The green and white tea extracts may be present in relative weight ratio of about 10,000:1 to about 1:10,000, preferably about 1,000:1 to about 1:1,000, more preferably from about 100:1 to about 1:100, optimally from about 2:1 to about 1:2. The ratio of green and white tea to black tea may be from about 10,000:1 to about 1:10,000, preferably from about 1,000:1 to about 1:1,000, optimally from about 500:1 to about 100:1.
Compositions of this invention will also include a cosmetically acceptable carrier. Amounts of the carrier may range from 1 to 99.9%, preferably from about 70 to about 95%, optimally from about 80 to about 90%. Among the useful carriers are water, emollients, fatty acids, fatty alcohols, humectants, thickeners and combinations thereof. The carrier may be aqueous, anhydrous or an emulsion.
Preferably the compositions are aqueous, especially water and oil emulsions of the W/O or O/W or triplex W/O/W variety. Water when present may be in amounts ranging from about 5 to about 99%, preferably from about 20 to about 90%, optimally from about 40 to about 80% by weight of the composition.
Emollient materials may serve as cosmetically acceptable carriers. These may be in the form of silicone oils, synthetic esters and hydrocarbons. Amounts of the emollients may range anywhere from about 0.1 to about 30%, preferably between about 1 and about 10% by weight of the composition.
Silicone oils may be divided into the volatile and nonvolatile variety. The term “volatile” as used herein refers to those materials which have a measurable vapor pressure at ambient temperature. Volatile silicone oils are preferably chosen from cyclic (cyclomethicone) or linear polydimethylsiloxanes containing from 3 to 9, preferably from 4 to 5, silicon atoms.
Nonvolatile silicone oils useful as an emollient material include polyalkyl siloxanes, polyalkylaryl siloxanes and polyether siloxane copolymers. The essentially nonvolatile polyalkyl siloxanes useful herein include, for example, polydimethyl siloxanes with viscosities of from about 5×10⁻⁶to 0.1 m²/s at 25° C. Among the preferred nonvolatile emollients useful in the present compositions are the polydimethyl siloxanes having viscosities from about 1×10⁻⁵to about 4×10⁻⁴m²/s at 25° C.
Another class of nonvolatile silicones are emulsifying and non-emulsifying silicone elastomers. Representative of this category is Dimethicone/Vinyl Dimethicone Crosspolymer available as Dow Corning 9040, General Electric SFE 839, and Shin-Etsu KSG-18. Silicone waxes such as Silwax WS-L (Dimethicone Copolyol Laurate) may also be useful.
Among the ester emollients are:
Alkenyl or alkyl esters of fatty acids having 10 to 20 carbon atoms. Examples thereof include isoarachidyl neopentanoate, isononyl isonanonoate, oleyl myristate, oleyl stearate, and oleyl oleate.
Ether-esters such as fatty acid esters of ethoxylated fatty alcohols.
Polyhydric alcohol esters. Ethylene glycol mono and di-fatty acid esters, diethylene glycol mono- and di-fatty acid esters, polyethylene glycol (200-6000) mono- and di-fatty acid esters, propylene glycol mono- and di-fatty acid esters, polypropylene glycol 2000 monooleate, polypropylene glycol 2000 monostearate, ethoxylated propylene glycol monostearate, glyceryl mono- and di-fatty acid esters, polyglycerol poly-fatty esters, ethoxylated glyceryl mono-stearate, 1,3-butylene glycol monostearate, 1,3-butylene glycol distearate, polyoxyethylene polyol fatty acid ester, sorbitan fatty acid esters, and polyoxyethylene sorbitan fatty acid esters are satisfactory polyhydric alcohol esters. Particularly useful are pentaerythritol, trimethylolpropane and neopentyl glycol esters of C₁-C₃₀alcohols.
Wax esters such as beeswax, spermaceti wax and tribehenin wax.
Sterols esters, of which cholesterol fatty acid esters are examples thereof.
Sugar ester of fatty acids such as sucrose polybehenate and sucrose polycottonseedate.
Hydrocarbons which are suitable cosmetically acceptable carriers include petrolatum, mineral oil, C₁₁-C₁₃isoparaffins, polyalphaolefins, and especially isohexadecane, available commercially as Permethyl 101A from Presperse Inc.
Fatty acids having from 10 to 30 carbon atoms may also be suitable as cosmetically acceptable carriers. Illustrative of this category are pelargonic, lauric, myristic, palmitic, stearic, isostearic, hydroxystearic, oleic, linoleic, ricinoleic, arachidic, behenic and erucic acids.
Fatty alcohols having from 10 to 30 carbon atoms are another useful category of cosmetically acceptable carrier. Illustrative of this category are stearyl alcohol, lauryl alcohol, myristyl alcohol and cetyl alcohol.
Humectants of the polyhydric alcohol-type can be employed as cosmetically acceptable carriers. Typical polyhydric alcohols include glycerin (glycerol), polyalkylene glycols and more preferably alkylene polyols and their derivatives, including propylene glycol, dipropylene glycol, polypropylene glycol, polyethylene glycol and derivatives thereof, sorbitol, raffinose, glucose, trehalose, hydroxypropyl sorbitol, hexylene glycol, 1,3-butylene glycol, isoprene glycol, 1,2,6-hexanetriol, ethoxylated glycerol, propoxylated glycerol and mixtures thereof. The amount of humectant may range anywhere from 0.5 to 50%, preferably between 1 and 15% by weight of the composition.
Thickeners can be utilized as part of the cosmetically acceptable carrier of compositions according to the present invention. Typical thickeners include crosslinked acrylates (e.g. Carbopol 982®), hydrophobically-modified acrylates (e.g. Carbopol 1382®), cellulosic derivatives and natural gums. Among useful cellulosic derivatives are sodium carboxymethylcellulose, hydroxypropyl methocellulose, hydroxypropyl cellulose, hydroxyethyl cellulose, ethyl cellulose and hydroxymethyl cellulose. Natural gums suitable for the present invention include guar, xanthan, sclerotium, carrageenan, pectin and combinations of these gums. Inorganics may also be utilized as thickeners, particularly clays such as bentonites and hectorites, fumed silicas, and silicates such as magnesium aluminum silicate (Veegum®). Amounts of the thickener may range from 0.0001 to 5%, usually from 0.001 to 1%, optimally from 0.01 to 0.5% by weight of the composition.
Emulsifiers may also be incorporated into compositions of this invention. These emulsifiers may be anionic, nonionic, cationic, amphoteric and combinations thereof. Useful nonionic type emulsifiers include the C₁₀-C₂₀fatty alcohol or acid hydrophobes condensed with from 2 to 100 moles of ethylene oxide or propylene oxide per mole of hydrophobe; C₂-C₁₀alkyl phenols condensed with from 2 to 20 moles of alkylene oxide; mono- and di-fatty acid esters of ethylene glycol; fatty acid monoglyceride; sorbitan, mono- and di-C₈-C₂₀fatty acids; block copolymers (ethylene oxide/propylene oxide); and polyoxyethylene sorbitan as well as combinations thereof. Alkyl polyglycosides and saccharide fatty amides (e.g. methyl gluconamides) are also suitable nonionic emulsifiers. Particularly preferred as an emulsifier is a hydrogenated castor wax alkoxylated with 40 moles ethylene oxide, available commercially as Cremophore RH-40®.
Mild emulsifiers of the anionic and amphoteric type may also be employed. Particularly preferred anionic examples include C₈-C₂₀acyl isethionate salts, lauroamphoacetate salts and sarcosinate salts. Preferred amphoterics include cocamidopropylbetaine and dimethylbetaine.
Advantageously it may be desirable to avoid the presence of any emulsifiers or surfactants because these actives tend to break the lipid barrier of the skin causing irritation. They may also interfere with color stability.
Amounts of the emulsifiers may range from about 0.05 to about 20%, preferably from about 0.1 to about 5%, more preferably from about 0.5 to about 0.8%, and optimally are present at less than about 0.1% by weight of the composition.
Sunscreen actives may also be included in compositions of the present invention. Particularly preferred are such materials as ethylhexyl p-methoxycinnamate, available as Parsol MCX®, Avobenzene, available as Parsol 1789® and benzophenone-3, also known as Oxybenzone. Inorganic sunscreen actives may be employed such as microfine titanium dioxide, zinc oxide, polyethylene and various other polymers. Amounts of the sunscreen agents when present may generally range from about 0.1 to about 10%, preferably from about 0.5 to 5%, optimally from about 1 to about 2% by weight of the composition.
Preservatives can desirably be incorporated into the cosmetic compositions of this invention to protect against the growth of potentially harmful microorganisms. Suitable traditional preservatives for compositions of this invention are alkyl esters of para-hydroxybenzoic acid. Other preservatives which have more recently come into use include hydantoin derivatives, propionate salts, and a variety of quatemary ammonium compounds. Cosmetic chemists are familiar with appropriate preservatives and routinely choose them to satisfy the preservative challenge test and to provide product stability. Particularly preferred preservatives are phenoxyethanol, methyl paraben, propyl paraben, imidazolidinyl urea, sodium dehydroacetate and benzyl alcohol. The preservatives should be selected having regard for the use of the composition and possible incompatibilities between the preservatives and other ingredients in the emulsion. Preservatives are preferably employed in amounts ranging from 0.01% to 2% by weight of the composition.
Compositions of the present invention may include vitamins. Illustrative vitamins are Vitamin A (retinol), Vitamin B₂, Vitamin B₆, Vitamin C, Vitamin E and Biotin. Derivatives of the vitamins may also be employed. For instance, Vitamin C derivatives include ascorbyl tetraisopalmitate, magnesium ascorbyl phosphate and ascorbyl glycoside. Derivatives of Vitamin E include tocopheryl acetate, tocopheryl palmitate and tocopheryl linoleate. DL-panthenol and derivatives may also be employed. Total amount of vitamins when present in compositions according to the present invention may range from about 0.001 to about 10%, preferably from about 0.01% to about 1%, optimally from about 0.1 to about 0.5% by weight of the composition.
Another type of useful substance can be that of an enzyme such as oxidases, proteases, lipases and combinations. Particularly preferred is superoxide dismutase, commercially available as Biocell SOD from the Brooks Company, USA.
Skin lightening compounds may be included in the compositions of the invention. Illustrative substances are placental extract, lactic acid, niacinamide, arbutin, kojic acid, ferulic acid, resorcinol and derivatives including 4-substituted resorcinols and combinations thereof. Amounts of these agents may range from about 0.1 to about 10%, preferably from about 0.5 to about 2% by weight of the compositions.
Desquamation promoters may be present. Illustrative are the alpha-hydroxycarboxylic acids and beta-hydroxycarboxylic acids. The term “acid” is meant to include not only the free acid but also salts and C₁-C₃₀alkyl or aryl esters thereof and lactones generated from removal of water to form cyclic or linear lactone structures. Representative acids are glycolic, lactic and malic acids. Salicylic acid is representative of the beta-hydroxycarboxylic acids. Amounts of these materials when present may range from about 0.01 to about 8% by weight of the composition.
Also included may be such materials as lipoic acid, retinoxytrimethylsilane (available from Clariant Corp. under the Silcare 1 M-75 trademark), dehydroepiandrosterone (DHEA) and combinations thereof. Ceramides (including Ceramide 1, Ceramide 3, Ceramide 3B and Ceramide 6) as well as pseudoceramides may also be utilized for many compositions of the present invention may also be excluded. Amounts of these materials may range from about 0.000001 to about 10%, preferably from about 0.0001 to about 1% by weight of the composition.
Colorants, fragrances, opacifiers and abrasives may also be included in compositions of the present invention. Each of these substances may range from about 0.05 to about 5%, preferably between 0.1 and 3% by weight of the composition .
Compositions of the present invention may further include non-tea herbal extracts. Illustrative extracts include Scullcap, Nettle Root, Swertia Japonica, Fennel and Aloe Vera extracts. Amount of each of the extracts may range from about 0.0001 to about 1%, preferably from about 0.01 to about 0.5%, optimally from about 0.05 to about 0.2% by weight of a composition.
Anti-irritant agents may also be present including those of steviosides, alpha-bisabolol and glycyhrizzinate salts, each anti-irritant agent being present in amounts ranging from about 0.0001 to about 1%, preferably from about 0.01 to about 0.3% by weight of the composition.
A further necessary aspect of the present invention is that of a substrate. Preferably the substrate is a water-insoluble substance. By “water-insoluble” is meant the substrate does not dissolve in or readily break apart upon immersion in water.
A wide variety of materials can be used as the substrate. The following nonlimiting characteristics are desirable: (I) sufficient wet strength for use, (ii) sufficient abrasivity, (iii) sufficient loft and porosity, (iv) sufficient thickness, (v) appropriate size, and (vi) non-reactive with components of the impregnating composition.
Nonlimiting examples of suitable substrates which meet at least some of the above criteria include nonwoven substrates, woven substrates, hydroentangled substrates, air entangled substrates and the like.
Preferred embodiments employ nonwoven substrates since they are economical and readily available in a variety of materials. By nonwoven is meant that the layer is comprised of fibers which are not woven into a fabric but rather are formed into a sheet, particularly a tissue. The fibers can either be random (i.e., randomly aligned) or they can be carded (i.e. combed to be oriented in primarily one direction). Furthermore, the nonwoven substrate can be composed of a combination of layers of random and carded fibers.
Nonwoven substrates may be comprised of a variety of materials both natural and synthetic. By natural is meant that the materials are derived from plants, animals, insects or byproducts. By synthetic is meant that the materials are obtained primarily from various man-made materials or from material that is usually a fibrous web comprising any of the common synthetic or natural textile-length fibers, or mixtures thereof.
Nonlimiting examples of natural materials useful in the present invention are silk fibers, keratin fibers and cellulosic fibers. Nonlimiting examples of keratin fibers include those selected from the group consisting of wool fibers, camel hair fibers, and the like. Nonlimiting examples of cellulosic fibers include those selected from the group consisting of wood pulp fibers, cotton fibers, hemp fibers, jute fibers, flax fibers, and mixtures thereof. Wood pulp fibers are preferred.
Nonlimiting examples of synthetic materials useful in the present invention include those selected from the group consisting of acetate fibers, acrylic fibers, cellulose ester fibers, modacrylic fibers, polyamide fibers, polyester fibers, polyolefin fibers, polyvinyl alcohol fibers, rayon fibers and mixtures thereof. Examples of some of these synthetic materials include acrylics such as Acrilan®, Creslan®, and the acrylonitrile-based fiber, Orlon®; cellulose ester fibers such as cellulose acetate, Arnel®, and Acele®; polyamides such as Nylons (e.g., Nylon 6, Nylon 66, Nylon 610 and the like); polyesters such as Fortrel®, Kodel®, and the polyethylene terephthalate fibers, Dacron@; polyolefins such as polypropylene, polyethylene; polyvinyl acetate fibers and mixtures thereof.
Nonwoven substrates made from natural materials consist of webs or sheets most commonly formed on a fine wire screen from a liquid suspension of the fibers.
Substrates made from natural materials useful in the present invention can be obtained from a wide variety of commercial sources. Nonlimiting examples of suitable commercially available paper layers useful herein include Airtex®, an embossed airlaid cellulosic layer available from James River Corporation, Green Bay, Wis.; and Walkisoft®, an embossed airlaid cellulosic available from Walkisoft U.S.A., Mount Holly, N.C.
Nonwoven substrates made from synthetic materials useful in the present invention can also be obtained from a wide variety of commercial sources. Nonlimiting examples of suitable nonwoven layer materials useful herein include HEF 40-047, an apertured hydroentangled material containing about 50% rayon and 50% polyester available from Veratec, Inc., Walpole, Mass.; HEF 140-102, an apertured hydroentangled material containing about 50% rayon and 50% polyester available from Veratec, Inc., Walpole, Mass.; Novenet® 149-191, a thermo-bonded grid patterned material containing about 69% rayon, about 25% polypropylene and about 6% cotton available from Veratec, Inc., Walpole, Mass.; HEF Nubtex® 149-801, a nubbed, apertured hydroentangled material, containing about 100% polyester available from Veratec, Inc. Walpole, Mass.; Keybak® 951V, a dry formed apertured material, containing about 75% rayon and about 25% acrylic fibers available from Chicopee Corporation, New Brunswick, N.J.; Keybak® 1368, an apertured material, containing about 75% rayon and about 5% polyester available from Chicopee Corporation, New Brunswick, N.J.; Duralace® 1236, an apertured, hydroentangled material, containing about 100% rayon available from Chicopee Corporation, New Brunswick, N.J.; Duralace® 5904, an apertured, hydroentangled material, containing about 100% polyester available from Chicopee Corporation, New Brunswick, N.J.; Sontaro® 8868, a hydroentangled material, containing about 50% cellulose and about 50% polyester available from Dupont Chemical Corp.
Most preferred as a towelette for purposes of this invention are non-woven substrates, especially blends of rayon/polyester and ratios of 10:90 to 90:10, preferably ratios of 20:80 to 80:20, optimally 40:60 to 60:40 by weight. A most useful towelette is a 70:30 rayon/polyester non-woven wipe article.
The substrate can be made into a wide variety of shapes and forms. Generally the substrate is in single use towelette form and may be folded. Advantageously the size of the towelette may range in length from 10 to 40 cm, preferably from 15 to 30 cm, optimally from 18 to 24 cm. The width of the towelette may range from 8 to 30 cm, preferably from 10 to 25 cm, optimally from 15 to 20 cm.
Anywhere from 5 to 100, preferably from 10 to 50 single towelettes may be stored within a dispensing pouch, preferably a moisture impermeable pouch. During storage and between dispensing, the pouch is resealable, usually via an adhesive strip covering a dispensing opening. Single towelette containing pouches may also be employed.
The substrates of the present invention can comprise two or more layers, each having a different texture and abrasiveness. The differing textures can result from the use of different combinations of materials or from the use of a substrate having a more abrasive side for exfoliation and a softer, absorbent side for gentle cleansing. In addition, separate layers of the substrate can be manufactured to have different colors, thereby helping the user to further distinguish the surfaces.
The water-insoluble substrate and cosmetic composition may be present in weight ratios of respectively about 20:1 to about 1:4, preferably from about 3:1 to about 1:1.5 and optimally about 1:1.
The term “comprising” is meant not to be limiting to any subsequently stated elements but rather to encompass non-specified elements of major or minor functional importance. In other words the listed steps, elements or options need not be exhaustive. Whenever the words “including” or “having” are used, these terms are meant to be equivalent to “comprising” as defined above.
Except in the operating and comparative examples, or where otherwise explicitly indicated, all numbers in this description indicating amounts of material ought to be understood as modified by the word “about”.
The following examples will more fully illustrate the embodiments of this invention. All parts, percentages and proportions referred to herein and in the appended claims are by weight unless otherwise illustrated.

EXAMPLE

A series of experiments were conducted to determine efficacy of tea extract and different types of copolymers on minimizing color change of a non-woven towelette formulated as a make-up remover.
Colorimetry was utilized for the evaluations. By way of background, calorimeters are devices that utilize red, green and blue filters to emulate the response of the human eye to light and color. A Gretag MacBeth Color-Eye 7000A utilized for the present experiments employs the CIE 1976 Lab color space method for measuring object color.
In this method, color space can be visualized as a three dimensional space, where the location of any color in the space is determined by its color coordinates: L, a, and b. L is a measure of the lightness of a sample, and ranges from 0 (black) to 100 (white). The quantities a and b (called opponent-type coordinates), define the degree of redness (positive a*) or greenness (negative a), yellowness (positive b) or blueness (negative b). These coordinates (a and b) approach zero for neutral colors (white, grays, and blacks). The higher the values for a and b, the more saturated the color. (1)
The difference in absolute color coordinates between a trial and a standard quantifies the Color Difference (D) between the two.
Standard(1)=L1×a1×b1
Trial(2)=L2×a2×b2
D(L)=L2−L1
D(a)=a2−a1
D(b)=b2−a1
These differences are called Deltas. Delta (DE) shows the magnitude of a total color difference.
DE=[(DL)²+(Da)²+(Db)²]½ (2)
The test procedure involved coating a cosmetic composition onto a non-woven substrate (70% rayon/30% polyester). Measurements were taken on the Gretag MacBeth Color-Eye 7000A instrument. The composition impregnated samples were placed in a temperature controlled chamber operating under the sequence: 4° C., 25° C., 41° C. and 51° C.; and measurements taken at intervals of: 7 days, 14 days, 30 days, 60 days and 90 days. The samples were measured in the reflectance mode.

Table I lists formulation ingredients for the various tested samples.

	TABLE I


	Sample (Weight %)

INGREDIENTS	A	B	C	D	E	F	G

Water	96.38	96.38	96.58	96.38	96.38	96.38	96.28
Glycerin	1	1	1	1	1	1	1
Hexylene Glycol	2	2	2	2	2	2	2
Roman	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Chamomile
Extract
Trimethylglycine	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Raffinose	0.01	0.01	0.01	0.01	0.01	0.01	0.01
Sodium PCA	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Glydant Plus	0.2	0.2	0.2	0.2	0.2	0.2	0.2
Liquid ®
Tea Extract Blend	—	0.2	—	0.2	0.2	0.2	0.2
Sodium	—	—	—	0.065	—	—	0.065
Hydroxide
(25% water)
Pemulen ®	—	—	—	0.1	—	—	—
Simulgel A ®	—	—	—	—	0.1	—	—
Aristoflex	—	—	—	—	—	0.1	—
AVC ®
Stabylen 30 ®	0.1	—	—	—	—	—	0.1

Tea Extract Blend is: (82-85% Distilled Water, 8-12% Butylene Glycol, 1-3% Camellia Sinensis Leaf Extract (green tea), 1-3% White Tea Leaf Extract, 0.09-1.1% Cyclopia Intermedia (Honeybush) Leaf, 0.09-0.11% Phenoxyethanol).
Pemulen ® is: Acrylates/C10-30 Alkyl Acrylate Crosspolymer
Simulgel A ® is: Ammonium Polyacrylate/Isohexadecane/PEG-40 Castor Oil
Aristoflex AVC ® is: Ammonium Acryloyldimethyltaurate/VP Copolymer
Stabylen 30 ® is: Acrylates/Vinyl Isodecanoate Crosspolymer

TABLE II


Colorimeter Results

Sample No. (Mean DE)

Temperature (° C.)	A	B	C	D	E	F	G

4 C.	4.237	4.7	4.733	3.356	4.61	3.993	2.02
25 C.	4.4	5.177	4.431	3.889	3.876	3.963	1.707
41 C.	4.203	4.325	4.072	3.624	4.278	3.857	2.187
51 C.	4.523	3.864	4.114	3.913	4.113	4.046	2.13

Based on the results reported in Table II, it is seen that the combination for Stabylen 30® and tea extract enhances color stability of the non-woven wipe. The absence of one of these ingredients or of both caused the DE to be higher (greater color instability) than the formula including both ingredients (Sample G). Other copolymers such as Pemulen®, Simulgel A® and Aristoflex AVC® were each less effective than the Stabylen 30®.

Claims

1. A cosmetic towelette product comprising:

(i) a water-insoluble substrate;

(ii) a cosmetic composition in contact with the substrate, the composition comprising:

(a) from about 0.001 to about 10% by weight of the composition of a co-polymer comprised from monomers one of which is a vinyl ester of a C₃-C₂₀acid;

(b) from about 0.000001 to about 2% by weight of the composition of a tea extract; and

(c) from about 1 to about 99.9% by weight of the composition of a cosmetically acceptable carrier.

2. The towelette according to claim 1 wherein the copolymer is Acrylates/Vinyl Isodecanoate Crosspolymer.

3. The towelette according to claim 1 wherein the tea extract is selected from the group consisting of Camellia Sinensis Green Tea Leaf Extract, White Tea Leaf Extract, Black Tea Leaf Extract and combinations thereof.

4. The towelette according to claim 1 wherein the substrate is a blend of rayon and polyester in a weight ratio of about 10:90 to about 90:10.

5. The towelette according to claim 1 wherein the composition further comprises less than about 0.1% of an emulsifier.

6. The towelette according to claim 1 wherein other monomers forming the copolymer are selected from the group consisting of acrylic acid, methacrylic acid, ethylacrylate, methyl acrylate, methyl methacrylate, ethyl methacrylate, butyl acrylate, hydroxypropyl methacrylate, hydroxyethyl acrylate, divinyl benzene, vinyl caprolactam, vinyl acetate, maleic acid or anhydride, acrylamide, methacrylamide, C_10-30ester of acrylic or methacrylic acids, acryloyldimethyltaurate, styrene, methyl styrene, isoprene, butene, isohexadecane, vinyl chloride, vinyl pyrrolidine, vinyl methyl ether, vinylformamide and combinations thereof, as well as salts of monomers having carboxylate groups.

7. The towelette according to claim 1 wherein the tea extract is a combination of green tea, white tea and black tea extracts.